*
{
    
}
body
{
    margin-top: 0px;
}
hr
{
    padding: 2px 1000px;
}
.main
{
    width: 1000px;
    margin: 0 auto;
    background-color: activeborder;
    
}
.header
{
    width: 100%;
    height: 150px;
    float: left;
    background-color: brown;
}
.Imgbanner
{
    width: 1000px;
    height: 120px;
}
.menu-ngang
{
    float: left;
}
.center
{
     
    float: left;
    width: 100%;
}
.footer
{
    background-color: #BAD3ED;
    height: 100px;
    float: left;
    width: 100%;
}